Ice-cream freezer



(No Model.) 2 Sheets-Sheet 1.

0. H.. A. GERDING. ICE. CREAM PREEZER.

. No. 431,345. Patented July 1, 1890.

(No'Modl.) -2 sheets-snm 2.

. C. H. A; GBRDING.

1GB CREAM PREBZER.

No. 431,345. Patented July l, 1890.

UNITED STATES PATENTV OFFICE.

CHARLES H. A. GERDING, OF NASHVILLE, TENNESSEE.

ICE-CREAM FREEZER.

SPECIFICATION forming part of Letters Patent No. 431,345, dated July 1,1890.

Serial No. 317,531. (No model.)

To r/,ZZ whom, it may concern:

Beit known that I, CHARLES lfl. A. GERDING, a citizen of the UnitedStates, residing atNashville, in the county of Davidson and State of`Tennessee, havelinvented certain new and useful Improvements inIce-Cream Freezers; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

It is the object of my invention to render the operation of freezing thecream more convenient, rapid, and certain, and also to provide for theready removal of the working parts of the device when the cream is readyfor use.

To these ends my invention consists in certain parts and combinationsthereof, hereinafter described and claimed.

In order 1o make theinvention more clearly understood, I have shown inthe accompanying drawings means for carrying the same into practicaleffect, though I wish it to be Vunderstood that my invention extends toother equivalent constructions.

In said drawings, Figure l is a side View of a freezer and actuatingmechanism embodying my invention, the tub being in section. Fig. 2 is avertical sectional view. Fig. 3 is a top view. Fig. 4 is a horizontalsection.

Referring to the drawings, B indicates the tub mounted upon a base orsupport b, which will admit of the passage beneath the tub of a shaft f.The latter is provided with a loose miter-gear e, having a clutch memberc, and with a sliding clutch member e2, which is splined upon the shaftor otherwisecaused to Arevolve therewith. A shifting-lever e3 engagesthe member c2 and is adapted to throw the same into gear with member e',thereby connecting gear e with and causing it to be revolved by theshaft f. As many freezers 'as may be desired will be arranged along theline of shaft f', and the latter will be kept in rotation by anysuitable motor.

D is the main'actuating-shaft of the freezer, carrying at its lower enda ruiter-wheel d', which gears with wheel c, passing upward through thebottom of the stationary tub B,

and carrying at its upper end a horizontal flange or plate C, whichrevolves with the shaft.

A is the freezer-can, adapted to rest upon and fit plate-C, and havinglateral lugs c2, which engage corresponding notches c inthe rim of theplate, whereby the revolution of the can by the plate is insured. On thebottom and inside the can is secured a central socket m, which isloosely fitted by the foot of a stationary shaft E. At its upper end andoutside the can said shaft has a bearing in a cross-bar or brace Z,secured to the edges of the tub by pins or screws fi. The upper end ofthe shaft and said bearing are squared to prevent rotation of the shaft.

F F indicate arms securely fastened to shaft E and adapted to remainstationary therewith while the can revolves. They carry at their outerends a blade Gr, which is held in close proximity to the inner face ofthe can, and which constantly removes the cream as fast as it becomeshardened by the neighboring ice.

H is a revolving shaft mounted in arms F, preferably on the oppositeside of shaft E from that on which the blade Gr is situated.

At its upper end shaft II may be steadied by `having a bearing in thecross-bar Z.

n is-a gear-wheel secured to shaft II and engaging with an internalgear-Wheel M, se'-` cured to the inner side of the freezer-can at ornear its mouth. Said wheel M is preferably constructed or formed with ahorizontalflange m, adapted to rest upon the edge of the can, and isprovided with pins c, which engage slots a in the can. The wheel is thusreadily removable. For greater strength and stiffness the can isthickened or provided lwith an external collar at its upper end, asshown at a. It will thus be readily seen that the revolution of wheel Maround wheel n will cause the latter, together with its shaft H, to berapidly turned. In order to balance or equalize the strain which tendsto separate wheels M and n and to displace the upper end of the cantoward the right in Fig. 2, two idler gears may be employed, the one pmounted loosely on the upper end of shaft E and engaging gear n, and theother o mounted IOO revolved byshaft H and extending upward and outwardtherefrom. Said paddles are arranged spirally, and are inclined so that.

their lower edges are, as they revolve, in advance of their upper edges.They thus act most eifectually both to thoroughly stir the cream, mixpure air with it, expel all impurities, throw inward and upward the hardcream which has been frozen and has been removed by blade G, and causethe soft cream to reach the sides of the can, there to be frozen, andthen in turn removed by said blade.

d is a supplemental blade or scraper,which may be employed, connectingand carried by the ends of a helical series of the flights I, and whichalso acts to remove the hardened cream from the surface of the can, and,its lower end being in advance of its upper, to force or Work upward thecream which it encounters, after the manner of a conveyer.

At f is shown-an inwardly and upwardly extending fiange formed upongear-wheel M along the lower faces of its teeth, which is adapted toarrest any metallic discoloring matter which might otherwise drop fromthe cogs into the cream.

The operation of freezing has been sufiiciently indicated.

In order to remove the stirring or agitating mechanism from thefreezer-can, it is simply necessary to partially rotate the flan gedgear M, bringing pins c into the vertical parts of slots a. Bar Z-andsaid wheel may then be removed, and subsequently or at the same time thearms F and parts carried thereby may be taken out.

It Will be seen that according to my in ven-l tion the top of thefreezer-can is open, allowing ready inspection of the contents duringthe freezing operation. All danger of making butter and spoiling thecream is thus ob- Viated.

Vhat I claim isl. In an ice-cream freezer, the combination, with thefreezer can or receptacle, of a scraper-blade mounted within said can,one of the said parts havin ga rotary movement relatively tothe other,anda stirrer and vertical conveyer, also mounted in the can, rotaryindependently of said can and adapted to give a vertical movement to thefrozen cream removed by the scraper, substantially as set forth.

2. In a freezer, the combination of the can, means for revolving thesame, a central stationary shaft having lateral arms, a scraperbladecarried thereby, a revoluble shaft journaled on said arms near the sideof the can, paddles situated one above the other and carried by saidrevoluble shaft-,land means for revolving the latter shaft,substantially as set. forth.

3. The combination of the can, the internally-geared ring M, removablyconnected therewith, and removable stationary central shaft E, arms F,eccentric revoluble shaft I-I, having a vertical series of paddles oneabove the other, gear n, and supportinggearsp and o, substantially asset forth.

4. In an icecream freezer, the combination of a rotary can, a stationarycentral shaft therein,a support for the upper end of said shaft, arms onsaid shaft carrying an eccentric stirrer-shaft, an internal gear on thecan, a pinion engaging said gear and secured to the said stirrer-shaft,an idler-pinion, also engaging the internal gear, and a secondidlerpinion mounted loosely on the central shaft and engaging saidfirst-mentioned pinions, suhstantiallyas set forth.

5. The combination of the open can A, the removable internal gear M,fitting within the can and having an external horizontal ange m andinternal ange f, whereby the contents of the can are protected fromdiscoloration from said gear M, a rotary shaft within the can, andgearing connecting said gear M with said shaft, substantially as setforth.

6. In a freezer, the combination, with the.

can, of an eccentrically-mounted shaft therein, and a series of inclinedflights I, carried thereby, having the helical scraper-blade (l,

connecting their ends, substantially as set forth.

In testimony whereof I affix my signature in the presence of twowitnesses.

CHS. H. A. GERDING.

Witnesses:

FRED C. DORIDER, WM. M. SIDEBoTroM.

